In short
The MKD041B-144-KP0-KN is a Bosch Rexroth Indramat MKD synchronous servo motor with an 82 mm flange, 2.7 Nm continuous standstill torque (60K), resolver feedback with integrated multiturn encoder, no holding brake, and IP65 protection. This guide explains the type code, ratings, drive pairing, installation, common faults and replacement β and where to buy it available to quote.
The Bosch Rexroth MKD041B-144-KP0-KN is a compact AC synchronous servo motor from the Indramat MKD series. It combines an 82 mm flange with 2.7 Nm continuous torque at standstill (60K) β 2.9 Nm at 100K β speeds up to 7500 rpm, and resolver feedback with an integrated encoder that gives absolute position over more than 4096 revolutions. It is widely used on legacy Indramat machine platforms where the original motor is no longer produced.
Palm Parts Solution keeps this motor available to quote from Florida: view the MKD041B-144-KP0-KN product page for current price, condition and quantity.
Decoding the MKD041B-144-KP0-KN type code
| Segment | Meaning |
|---|---|
MKD | Indramat MKD synchronous servo motor family |
041 | Frame size β 82 mm flange |
B | Motor length B (rotor stack length) |
144 | Winding code β defines voltage/torque constants |
K | Shaft with keyway |
P | Shaft seal fitted |
0 | Without holding brake |
KN | Resolver feedback with integrated (multiturn) encoder |
Reading the code correctly matters when cross-checking a machine nameplate: two MKD041B motors with different winding codes are not interchangeable, because the voltage constant changes the achievable speed at a given DC bus voltage.
Key technical data
- Continuous torque at standstill: 2.7 Nm (60K) / 2.9 Nm (100K)
- Continuous current at standstill (100K): 8.2 A
- Rated speeds: 3000 rpm at 115 V, 4500 rpm at 170 V
- Maximum speed: 7500 rpm
- Voltage constant: 36.3 V/1000 minβ»ΒΉ; torque constant: 0.4 Nm/A
- Winding resistance: 1.8 Ξ©
- Flange size 82 mm, motor length B, mass 4.4 kg
- Protection class IP65, insulation class F
- Feedback: resolver with integrated encoder, absolute over 4096+ turns
- Holding brake: none on this variant
Where it fits in the drive system
MKD motors are the motor side of an Indramat servo axis. The MKD041B-144-KP0-KN is normally driven by a DDS, TDM, HDS or DKC controller, or by a modern IndraDrive unit with the correct motor data set loaded. Three points decide whether a pairing works:
- Current match β the drive continuous current must cover the 8.2 A standstill current plus the peak current the axis demands.
- Feedback match β the drive must be configured for resolver-with-encoder feedback, not for a pure resolver or an EnDat encoder.
- Motor data set β Indramat drives identify MKD motors from the feedback data memory; a wrong or missing parameter set produces a motor-type fault at power-up.
Installation and commissioning notes
- Check the shaft keyway and coupling fit before mounting: this variant has a keyed shaft with seal, so a coupling machined for a smooth shaft will not clamp correctly.
- This motor has no holding brake. On a vertical or gravity-loaded axis, an external brake is mandatory β do not rely on drive torque at standstill.
- Ground the motor frame and use the original shielded power and feedback cables. A large share of "random" following errors on MKD axes are shield or grounding faults, not motor faults.
- After a motor exchange, run the drive commissioning routine again so commutation offset and absolute position reference are re-established.
Common faults and diagnostics
| Symptom | Likely cause | Check |
|---|---|---|
| Excessive following error or axis runaway at enable | Commutation offset lost, or feedback cable phases swapped | Re-run commutation setup; verify feedback wiring pin-for-pin |
| Feedback / encoder fault at power-up | Damaged resolver cable, moisture in the connector, failed feedback memory | Measure resolver windings; inspect connector seals |
| Overheating, thermal trip | Blocked cooling, duty cycle above continuous rating, dragging brake on braked variants | Compare actual RMS current to the 8.2 A continuous figure |
| Bearing noise, vibration at speed | Worn bearings after long service, coupling misalignment | Turn the shaft by hand with power off; check alignment |
| Insulation fault / drive ground alarm | Winding insulation degraded by age and coolant ingress | Megger test winding-to-frame with the drive disconnected |
Replacing an MKD041B-144-KP0-KN
- Record the full nameplate type code of the installed motor β replace like for like, including winding code, shaft, seal, brake and feedback options.
- Power down and confirm the DC bus is discharged before disconnecting the power connector.
- Mark the coupling position and shaft orientation so the mechanical reference can be restored.
- Fit the replacement, reconnect power and feedback, then re-commission the axis and re-home it.
- Verify no-load current and temperature rise over a full cycle before releasing the machine to production.
Availability
Because MKD motors are a legacy Indramat product line, lead times on the open market are unpredictable. Palm Parts Solution holds the MKD041B-144-KP0-KN available to quote, ships from a Florida warehouse with free domestic FedEx Priority and UPS Ground, and backs every unit with a 1-year warranty.
π Check price and availability for the Bosch Rexroth MKD041B-144-KP0-KN
Need a formal quote, a matched drive, or a braked or different-winding MKD variant? Request a quote or open the product page and use the Request Formal Quote button β our team answers 24/7.
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